Here's a more detailed explanation:
* Aufbau comes from the German word for "building up".
* The principle describes the process of filling electron orbitals in an atom.
* Electrons first occupy the lowest energy levels available. As you move further from the nucleus, energy levels increase.
* Orbitals within a subshell are filled in order of increasing energy (e.g., 2s before 2p).
* Hund's Rule comes into play here, stating that electrons will singly occupy each orbital within a subshell before pairing up in the same orbital.
Let me know if you'd like to see how the Aufbau principle works with specific examples!
